Fluid-pressure recorder.



T. W. NEWBURN.

FLUID PRESSURE RECORDER.

APPLICATION FILED MAR. 20. m5.

1,274,189. Patented July 30, 1918. f

2 SHEETS-SHEET lm 1%M & aw

T. W.'NEWBURN.

FLUID PRESSURE RECORDER,

APPLICATION FILED MAR. 20. 1915.

1,274,189. Patented Jul ,1918.

2 SHEETS- T 2.

I MW WWW N UNITED STATES PATENT ormon.

THEODORE W. NEWIBURN, 0F EDGEWOOD, PENSYLVANIA, ASSIGN OR TO THEWESTING- HOUSE AIR BRAKE COMPANY, OF WILMERDING', PENNSYLVANIA, ACORPORATION OF PENNSYLVANIA.

To all whom it may concern:

Be. it known that I, THEODORE W. N E W- BURN, a citizen of the UnitedStates, residmg at Edgewood, in the county of Allegheny and State ofPennsylvania, have invented new and useful Improvements in Fluid-Pressure Recorders, of which the following is a specification.

This invention relates to recording devices, and more particularly to adevice for recording variations in fluid pressure.

The particular type of recording device for which this invention isdesigned employs a moving sheet or band upon which the record is made, amechanism, such as a clock work movement, being provided for effectingthe movement of the record sheet;

One obj ect of my invention is to provide a device for starting andstopping themovement of the sheet and controlled byfluid,

the pressure of which is to be recorded, so that movement of the sheettakes place only when fluid under pressure is supplied to the recorder.

In SOme cases, it may be desirable to have a record of the time elapsingbetween periodical admissions of fluid to the recorder and for thispurpose, another feature of my invention consists in providing meanscontrolled by fluid, the pressui'e of which is to he recorded foreffecting the movement of the record sheet at a slow speed when no fluidunder pressure is supplied and adapted to cause a more rapid movement ofthe sheet upon supplying fluid to the recorder.

In the accompanying drawings; Figure 1 is a front elevation of a fluidpressure recording device with my improvement applied thereto; Fig. 2 aside elevation thereof Fig. 3 a plan View thereof; Fig. 4 a frontelevation of a portion of a recording device with a device applied inaccordance with my FLUID-PRESSURE RECORDER.

Specification of Letters Patent. Patented J llly 30, 1918. Applicationfiled March 20, 1915. Serial No. 15,683.

trolled according to the pressure of the fluid for recording thepressure on the record sheet 3. p V I The mechanism for moving the arm4: according to variations in fluid under pressure is not specificallyshown in the drawings, any desired mechanism being adapted for this use,such, for example, as that shown in either one of prior Patents No.18%A11 of W. F. De Forest, dated October 18, 1892, or No. 1,072,161 ofA. P. Phillips,'dated September 2, 1913.

Projecting through the side of thecasing of the clock work mechanism isa shaft 5 carrying a cross bar 6 at the end and said shaft is connectedto the escapement mechanism of the clock, so that the 6 rocks with theescapement and by stopping the movement of the bar, the running of theclock mechanism can be stopped.

According to my invention, a small piston cylinder 7 is mounted on thebase of the recorder, in vertical alinement with the cross bar 6 andwithin the cylinder is a piston 8 carrying a rod 9, to the upper end ofwhich is attached a conical trip 10 adapted to engage the cross bar 6.

A tube 11 opens to the chamber below the piston 8 and is adapted toadmit thereto fluid flowing to the recorder,the pressure of which is tobe recorded.

In operation, the trip 10 is normally maintained by gravity in theposition shown in Fig. 1, in which. the cross bar 6 is prevented-from'movin'g by engagement with the trip 10. Upon supplying fluid underpressure to the recorder, the same also flows through the tubell to theunder side of piston 8' and the piston is'thereby actuated, so that thetrip 10 is elevated to permit movement of In Figs. 4 and 5 of thedrawings, a construction is shown whereby the record sheet can be run ata slow speed when no fluid and the trip 10' pressure is being recordedand at a higher speed when recording fluid pressure.

In this case, the clock mechanism is pro: videdwith a suitableattachment such that by moving a projecting lever 12 to its upperposition the clock mechanism will operate at a slow speed and by movingthe same downwardly the clock mechanism will run at a higher speed.

Means adapted to change the speed of the clock movement is shown in Fig.6 of the drawings, in which the lever 12 is pivotally connected to adriven gear A of the clock movement.

Two escapement dinary construction devices B and (lot orare mounted onopposite sides of the gear A, the escapement device B having a pinion Dadapted to mesh with gear A and the escapement device C having a gear Eadapted to mesh with said gear.

The escapement devices have their respective gear ratiossoproportionedthat the escapement device 13 will cause the clockmovement to run at a slow speed and the escapement device C at a higherspeed,

The gear A may be thrown into mesh with eitherthe pinion I) or the gearE by the movement of lever 12, at the same time remaining in mesh withthe gearing of the clock movement. 7

Pivotally mounted on the clock casing is a rocker arm 13 having a forkedend adapted to engage the lever 12 and the opposite end of the arm 13 ispivotally connected to the piston rod 9 of piston 8. r

In operation, it will be evident that when there is no fluid underpressure acting on the piston 8, the same will rest in its clownwardposition, so that the arm 13 operates to maintain the lever 12 in itsupper position, in which the clock mechanism runs at a slow speed and bymoving the record sheet, indicates the time that no pressure is beingrecorded.

When fluid under pressure is supplied to the recorder, the piston 8 isactuated therebyto shift the arm 13 and move the lever 12 downwardly.The clock mechanism then operates at a higher speed while variations influid pressure are being recorded.

Copies oi this patent may be obtained for Having now described myinvention, what I claim as new and desire to secure by Letters Patent,is:

1. The combination with a mechanism for operating a record sheet and arecording arm operated by variations in fluid under pressure forrecording said variations on the record sheet, of means operated byfluid, the pressure of which is to be recorded, for controlling theoperation of said mechanism.

2. The combination with a mechanism for operating a record sheet and arecording arm. operated by variations in fluid under pressure forrecording said variations on the recordsheet, of a piston subject tofluid, the pressure of which is to be recorded, for controlling theoperation of said mechanism. r

3. The combination with a mechanism for moving a record sheet atdifferent speeds and means for recording variations in fluid pressure onthe record sheet, of means operated by fluid, the pressure of which isto be recorded, for determining the running speed of said mechanism.

' 4. The combination with a mechanism for moving a record sheet andadapted to run at a high speed and a low speed, a lever adapted in oneposition to adjust said mechanism to run at the high speed and inanother position at the low speed, and means for recording variations influid pressure on the record sheet, of means operated by fluid, thepressure of which is to be recorded, for actuating said lever.

5. The combination with a mechanism for moving a record sheet andadapted to run at a high speed and a low speed, a lever adapted in oneposition to adjust said mechanism to run at the high speed and in another position at the low speed, and means for recording variations influid pressure on the record sheet, of a piston operated by fluid, thepressure of which is to be recorded, for operating said lever.

In testlmony whereof I have hereunto set my hand.

five cents each, by addressing the Commissioner- 01 latents, Washington,D. G.

